126-2016 Hydraulic Pilot Gear Pump is an aftermarket replacement hydraulic pilot gear pump for Caterpillar CAT excavators, including 320D, E320B, E320C. The main hydraulic pump converts engine power into pressurized oil flow. Supplied by LIONKITS as aftermarket new with a 6-month warranty.
126-2016 Hydraulic Pilot Gear Pump Specifications
- Product Type: Hydraulic Pilot Gear Pump
- Part Number: 126-2016, 1262016
- Compatible Brand: Caterpillar CAT
- Machine Type: Excavator
- Condition: Aftermarket new
- Product Weight: 2.300 kg/5.07 pounds(1 piece)
- Warranty: 6 months
- Brand: LIONKITS
- Country of Origin: China
Caterpillar CAT Models Compatible with the 126-2016 Hydraulic Pilot Gear Pump
- Caterpillar CAT 320D E320B E320C Excavator
Your model is not listed? Contact LIONKITS via live chat or email with your machine model and nameplate photo, and we will confirm compatibility.
What Does a Hydraulic Pump Do?
The main hydraulic pump converts engine power into pressurized oil flow. That oil moves the boom, arm, bucket, swing and travel functions, so every machine movement depends on it. Because it takes the most punishment, it is usually the first major hydraulic component to wear out.
Signs the Part Needs Replacing
- Slow or weak movement on all functions: when everything is slow at once, not just one circuit, the pump is the most likely source.
- Whining, knocking or grinding noise: internal wear or cavitation, especially on start-up or when the oil is cold.
- Hydraulic oil running hot: internal bypass leakage turns pressure into heat.
- Metal particles in the filter or case drain: a failing pump sheds metal and pushes out more case drain flow.
- Erratic or spongy movement, foamy oil: air entering the suction line, or aeration, upsets pump flow.
These symptoms overlap with clogged filters, low oil, air in the suction line and worn valves, so check the filters and oil level before replacing the part.
How to Order and Install the 126-2016 Hydraulic Pilot Gear Pump
- Confirm your machine model, the part number and the pump model on your existing pump before ordering.
- Send a photo of the old pump or the nameplate if you are not sure; LIONKITS will confirm fitment for you.
- Change the hydraulic oil and the return filters before fitting the new pump; a new pump installed in contaminated oil will fail early.
- If the old pump failed internally and shed metal, flush the tank, hoses and oil cooler and inspect the control valve and motors for contamination.
- Fill the pump case with clean hydraulic oil and prime the pump as the service manual specifies before the first start.
- Check the suction line, strainer and fittings for air leaks, and tighten bolts to the specified torque.
- Run the machine at low speed first, then check pressure, noise and leaks.
Shipping, Payment and Support
- Dispatch and delivery: Your package will be sent within 2-3 business days, and another 3-7 business days to arrive in your country
- Payment methods: Credit Card, PayPal, T/T, Western Union
- Returns and refunds: If you encounter any issues with the product, please contact us promptly and provide detailed feedback. We will handle the return or exchange promptly
Frequently Asked Questions
What is the 126-2016 Hydraulic Pilot Gear Pump?
The 126-2016 Hydraulic Pilot Gear Pump is an aftermarket replacement hydraulic pilot gear pump for Caterpillar CAT excavators, supplied as aftermarket new under part numbers 126-2016, 1262016.
Which Caterpillar CAT models does the 126-2016 Hydraulic Pilot Gear Pump fit?
It is listed for 320D, E320B, E320C. If you are unsure, send your machine nameplate to LIONKITS for confirmation.
How do I know my hydraulic pump is failing?
Typical signs are slow or weak movement on all functions, whining or knocking noise, hot hydraulic oil, metal particles in the filter or case drain and erratic or spongy movement.
What are the warranty and delivery terms for the 126-2016 Hydraulic Pilot Gear Pump?
Warranty: 6 months.



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